HP XP Business Copy Software User Manual
Page 27
NOTE:
The P-VOL remains read-enabled during the quick restore operation only to enable the host to
recognize the volume. Data on the P-VOL is not guaranteed until the quick restore operation is complete
and the status changes to PAIR.
NOTE:
When a quick restore operation is in progress, the array management user interface may display old
configuration information. To update the information in the user interface, wait for the quick restore
operation to finish, and click Refresh.
NOTE:
When a quick restore operation is in progress, you must not change the configuration of parity groups
from VLL or SVP. When the pair status is COPY(RS-R) in the XP Business Copy Software main panel,
the quick restore operation is performed.
CAUTION:
During a quick restore operation, the RAID levels, HDD types, and Cache LUN settings of the P-VOL
and S-VOL are exchanged. For example, if the P-VOL has a RAID-1 level and the S-VOL has a RAID-5
level, the quick restore operation changes the P-VOL to RAID-5 and the S-VOL to RAID-1.
To avoid any performance impact due to the quick restore operation
1.
Ensure that the P-VOL and S-VOL have the same RAID level and HDD type before performing the
quick restore operation. To restore the original volume designations after a quick restore, stop
host I/Os to the pair, split the pair, perform the quick restore operation for that pair again, and
restart host I/Os to the pair.
2.
Because Cache LUN settings are exchanged during a quick restore operation, you must perform
one of the following operations. If you do not, the change of location of cache residence areas
may cause I/O performance to the Cache LUN data to be down.
• Set the same Cache LUN settings (locations) for the P-VOL and S-VOL before performing the
quick restore operation.
• Release the Cache LUN settings of the P-VOL and S-VOL before the quick restore operation,
and reset the Cache LUN settings of the P-VOL and S-VOL after the pair changes to PAIR status
as a result of the quick restore operation.
CAUTION:
If you do not want the P-VOL and S-VOL to be resynchronized after the quick restore operation, set
the Swap&Freeze option before performing the quick restore operation (see
).
XP Business Copy User Guide
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